Possibility to drag'n'drop links to the sidebar

[mr-cheffy]

What feature would you like to see?

Possibility to drag'n'drop links to Zen sidebar. It would extend sidebar functionality much more than the + icon on the bottom of it.
Ekrano įrašas_20240813_200204.webm

What platform are you seeing the problem on?

Linux

Additional context

No response

~ Created automatically from issue: #246

[MrAn0nym]

DnD to the tab list to open the link in a new tab would also be greatly appreciated 😁